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Direct numerical simulation of single-species and binary-species boundary layers at high pressure

Toki, Takahiko and Bellan, Josette R. (2021) Direct numerical simulation of single-species and binary-species boundary layers at high pressure. In: AIAA Scitech 2021 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2021-0682. ISBN 9781624106095. https://resolver.caltech.edu/CaltechAUTHORS:20210112-105611979

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Abstract

Direct numerical simulations of single-species and binary-species temporal boundary layers at high pressure are performed. The main objective is to investigate flow physics in a binary-species boundary layer at high pressure, with special attention to mass diffusion. The working fluids are nitrogen in the single-species cases, and a mixture of nitrogen and methane in the binary-species cases. An investigation of mean profiles shows that velocity and temperature profiles have steep gradients near the wall, whereas the mass fraction profiles do not have a steep gradient. This result indicates that the similarity law between velocity, temperature and mass fraction does not hold true in the binary-species boundary layer. The comparison of turbulent fluctuations shows that the qualitative characteristics of velocity and temperature are similar to each other. In contrast, profiles of mass fraction fluctuations are largely different from those of velocity and temperature. This result indicates that mass diffusion is not similar to momentum and thermal diffusions in binary-species boundary layers.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2021-0682DOIArticle
ORCID:
AuthorORCID
Bellan, Josette R.0000-0001-9218-7017
Additional Information:© 2021 by California Institute of Technology. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2021-0682
Record Number:CaltechAUTHORS:20210112-105611979
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210112-105611979
Official Citation:Direct numerical simulation of single-species and binary-species boundary layers at high pressure. Takahiko Toki and Josette R. Bellan. AIAA Scitech 2021 Forum. January 2021; DOI: 10.2514/6.2021-0682
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107433
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:12 Jan 2021 19:19
Last Modified:12 Jan 2021 19:19

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